<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<div class="note" id="txt">文本</div>
		<div class="note">文本</div>
		<div class="note" onmousemove="fun()">文本</div>
		<script>
			var obj = document.getElementById("txt");
			console.log(typeof obj);
			
			var obj2 = document.getElementsByClassName("note");
			console.log(typeof obj2);
			
			console.log(typeof obj.innerHTML);
			function fun(){
				obj2[2].style.fontSize = "30px";
			}
			alert(eval("1+1"))
			alert(eval("1"+"1"))
		</script>
	</body>
</html>
